Bark beetles, <i>Pseudohylesinus</i> spp. (Coleoptera: Scolytidae), associated with amabilis fir defoliated by <i>Neodiprion</i> sp. (Hymenoptera: Diprionidae)

Authors

  • L. H. McMullen Pacific Forest Research Centre Canadian Forestry Service Environment Canada Victoria, B.C.
  • R. L. Fiddick Pacific Forest Research Centre Canadian Forestry Service Environment Canada Victoria, B.C.
  • R. O. Wood Pacific Forest Research Centre Canadian Forestry Service Environment Canada Victoria, B.C.

Keywords:

bark beetles, <i>Pseudohylesinus</i> spp., Coleoptera, Scolytidae, amabilis fir, <i>Neodiprion</i> sp., Hymenoptera, Diprionidae

Abstract

Only <i>Abies amabilis</i> (Dougl.) Forbes heavily defoliated by a sawfly, <i>Neodiprion</i> sp., supported broods of <i>Pseudohylesinus </i>spp.. Although many trees with less defoliation showed evidence of attack, usually it was caused by adult beetles making overwintering niches. <i>P. granulatus</i> (Leconte) was found on the lower bole, whereas <i>P. grandis</i> Swaine and <i>P. nobilis</i> Swaine were found on the upper bole. Defoliated <i>Tsuga heterophylla</i> (Raf.) Sarg. were not attacked by bark beetles.

References

Bright, D.E. 1976. The insects and arachnids of Canada. Part II. The bark beetles of Canada and Alaska, Coleoptera: Scolytidae. Can. Dept. Agric. Pub!. 1576. 241 pp.

Dyer, E.D.A. and W.W. Nijholt. 1965. Observations of overwintering Pseudohylesinus and Trypodendron. Can. Dept. For. Bi-mon. Prog. Rpt. 21(4):3.

Harris, J.W.E., S.J. Allen, D.G. Collis, and E.G. Harvey. 1966. Status of the balsam woolly aphid, Adelges piceae (Ratz.), in British Columbia, 1965. Dept. For. Res. Lab., Victoria, Inf. Rept. BC-X-5.

Kinghorn, J.M. 1954. The influence of stand composition on the mortality of various conifers caused by defoliation by the western hemlock looper on Vancouver Island, British Columbia. For. Chron. 30:380-400.

Shea, K.R., N.E. Johnson, and S. McKee. 1962. Deterioration of Pacific silver fir killed by the balsam woolly aphid. J. For. 60:104-108.

Thomas, G.M. and K.H. Wright. 1961. Silver fir beetles. U.S. Dept. Agric. For. Pest Leafl. 60. 7pp.

Van Sickle, A. and R.L. Fiddick. 1979. Sawfly infestation near Kelsey Bay, Vancouver Island. Envir. Can. For. Serv. Pacific For. Res. Centre Pest Rept., October. 2 pp.

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Published

2019-08-28

Issue

Vol. 78 (1981): Journal of the Entomological Society of British Columbia

Section

Articles

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